It depends on how far you want to go with it.... I don't think it's worth it if you REALLY want to run MAP. Getting past the self-learning/ auto-trim on the stock ECU is more of a PITA than it's worth. By the time you buy the equipment to run MAP, you could've gotten a cheap standalone with more inputs.
It's fine if you keep the MAF, and don't mind screwing around with injector lag settings and such. The datalogger on it is actually useful, and helps a lot while tuning it.
My biggest gripe: No knock feedback (you can read knock, but can't have it do anything about it).
Best feature: Cost.
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